Eating a healthy diet is associated with a greatly reduced risk of type 2 diabetes in women and particularly benefits those from ethnic minorities, a 28 year follow-up study of nearly 200 000 US women has found.

Researchers analysed diet and health data on 156 030 non-Hispanic white women, 2026 Asian women, 2053 Hispanic women, and 2307 black women in the Nurses’ Health Study. Participants were followed up for 28 years, and they …